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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties


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Administrative data

Link to relevant study record(s)

Description of key information

extremely flammable gas

Key value for chemical safety assessment

extremely flammable

Additional information

The substance is not pyrophorice, and yields no flammable gases on contact with water. Given the flammability limits in air of 2.6 - 100 vol%, however, the substance is extrmely flammable. Aqueous solutions of ethylene oxide are flammable to highly flammable liquids, depending on the concentration.

Justification for classification or non-classification

The substance is igniteable when in a mixture of 13 % or less in air. ---> GHS classification criteria for flammable gases: category 1 (extremely flammable gas).